Heteroatom‐Doped Carbon Dots (CDs) as a Class of Metal‐Free Photocatalysts for PET‐RAFT Polymerization under Visible Light and Sunlight

Jiang, Jingjie; Ye, Gang; Wang, Zhe; Lu, Yuexiang; Chen, Jing; Matyjaszewski, Krzysztof

doi:10.1002/anie.201807385

Cited by 128 publications

(127 citation statements)

References 75 publications

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“…processes, reversible addition-fragmentation chain transfer (RAFT) and atom transfer radical polymerization (ATRP) [118]. While there has been no report available with NIR-sensitized NMP, there exist a few reports for RAFT polymerization with NIR light [119][120][121]. Recently, ATRP with Cu(II)-catalyst scaling in ppm amount in combination with a NIR sensitizer facilitated tailor-made synthesis of block copolymers [81].…”

Section: Nir Sensitized Cationic Photopolymerizationmentioning

confidence: 99%

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Strehmel¹,

Schmitz²,

Kütahya³

et al. 2020

Beilstein J. Org. Chem.

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Cyanines derived from heptamethines were mainly discussed regarding their functionalization to broaden the solubility in different surroundings exhibiting either hydrophilic or hydrophobic properties and to tailor made the ΔG et photopysical properties with respect to absorption and fluorescence. Electrochemical properties were additionally considered for some selected examples. The cyanines chosen comprised as end groups either indolenine, benzo[e]- or benzo[cd]indolium pattern, which facilitated to shift the absorption between 750–1000 nm. This enabled their use in applications with light sources emitting in the near-infrared (NIR) region selected from high power LEDs or lasers with line-shaped focus. The absorbers considered were discussed regarding their function as sensitizer for applications related to Chemistry 4.0 standards. These were mainly photopolymer coatings, which can be found for applications in the graphic industry or to protect selected substrates. The huge release of heat on demand upon turning ON or OFF the NIR light source enables them for photothermal treatment in processes requesting heat to initiate either chemical (activated reactions) or physical (melting, evaporation) events.

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Section: Nir Sensitized Cationic Photopolymerizationmentioning

confidence: 99%

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Strehmel¹,

Schmitz²,

Kütahya³

et al. 2020

Beilstein J. Org. Chem.

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“…[13] CDs also demonstrate interesting electrochemical redox properties. [14] Recently,CDs also received attention for photosensitized RAFT polymerization, [15] which was the first report regarding their use in ap hotocontrolled radical polymerization. Exposure to visible light as well as sunlight resulted in low dispersities,g enerally around 1.1.…”

mentioning

confidence: 99%

Carbon Dots as a Promising Green Photocatalyst for Free Radical and ATRP‐Based Radical Photopolymerization with Blue LEDs

et al. 2020

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Carbon dots (CDs) have been used for the first time as a sensitizer to initiate and activate free radical and controlled radical polymerization, respectively, based on an ATRP protocol with blue LEDs. Consideration of diverse heteroatom‐doped CDs indicated that N‐doped CDs could serve as an effective photocatalyst and photosensitizer in combination with LEDs emitting either at 405 nm or 470 nm. Free radical polymerization was initiated by combining the CDs with an iodonium or sulfonium salt in tri(propylene glycol) diacrylate. Polymerization of methyl methacrylate (MMA) by photo‐induced ATRP was achieved with CDs and ethyl α‐bromophenylacetate using CuII as catalyst in the ppm range. The polymers obtained showed temporal control, narrower dispersity ≲1.5, and chain‐end fidelity. The first‐order kinetics and ON/OFF experiments additionally gave evidence of the constant concentration of polymer radicals. No remarkable cytotoxic activity was observed for the CDs, underlining their biocompatibility.

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“…33 Very recently, carbon dots (CDs) have been reported to be used as efficient metal-free photocatalysts in visible-light-regulated PET-RAFT polymerization. 34 As new nanocarbon materials, CDs are well-known for their low toxicity, low cost, good solvent adaptability and excellent photostability. Although such metal-free PET-RAFT systems may be environment-friendly on the whole, the catalysts remaining in the polymer products still create some problems in the performance of the nal products.…”

Section: Introductionmentioning

confidence: 99%

Light and magnetism dual-gated photoinduced electron transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization

Wang

Zhang

et al. 2020

RSC Adv.

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Heteroatom‐Doped Carbon Dots (CDs) as a Class of Metal‐Free Photocatalysts for PET‐RAFT Polymerization under Visible Light and Sunlight

Cited by 128 publications

References 75 publications

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Photophysics and photochemistry of NIR absorbers derived from cyanines: key to new technologies based on chemistry 4.0

Carbon Dots as a Promising Green Photocatalyst for Free Radical and ATRP‐Based Radical Photopolymerization with Blue LEDs

Light and magnetism dual-gated photoinduced electron transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization

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